accident
announce
attention
background
beware
board
careful
cartoon
caution
cleaning
clipart
color
danger
design
drawing
element
emblem
equipment
falling
flat
floor
graphic
housekeeping
housework
human
hygiene
illustration
isolated
janitory
notice
person
pictogram
plastic
prevention
public
safety
sanitary
service
sign
signboard
slip
slippery
surface
symbol
vector
warning
washing
wet
white
yellow